Subject:
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Re: Question about generating curves
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Newsgroups:
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lugnet.cad.dev
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Date:
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Wed, 10 Jan 2001 16:07:27 GMT
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Viewed:
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581 times
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"Joseph Cardana" <jcardanas@home.com> wrote in message
news:G6xJvM.JIv@lugnet.com...
> In lugnet.cad.dat.parts, Franklin W. Cain writes:
>
> <snip>
> <snip>
>
> > Franklin
>
> Franklin,
>
> Your quite a humorus man. What the hell did you just say! Please • allow
> me to explain why I'm laughing. I didn't graduate high school, I don't • have
> a GED but even with an IQ of 168, I still don't know how to use the
> conditional line.
> I fully understand the concept of using large amounts of small lines • to
> simulate a curve. I can do that using a bunch of regular lines. How is • the
> conditional line special?
Conditional lines are used to show the outer boundary of a curved
_surface_. Consider a cylinder. Between each quad that forms the
cylinder there must be an edgeline. But you only want that edgeline to
render if it's one of the outside edgelines (if it forms the outer bound
of the cylinder).
> I've noticed there are two lines. One is the
> color I select and the other is a dark pink. If I move the primary line • as a
> whole, the secondary line stays stationary. If I rotate the line, they • both
> rotate.
I'm not sure what you are using for a viewer, but the first two sets of
coordinates (x,y,z) in the type 5 line define the conditional edgeline.
The second two sets of coordinates are the points used to decide if the
edgeline gets rendered. If (from the current viewpoint) both points are
on the same side of the edgeline, then the edgeline gets rendered. If the
two points are on opposite sides of the edgeline, the edgeline doesn't get
rendered.
> I haven't picked apart any other parts, subparts, or primitives. Is
> there any that I could use as an example?
Take a look at the 4-4cyli.dat.
-John Van
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Message has 1 Reply:
 | | Re: Question about generating curves
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| Thanks everyone for your helpful information. I believe that I can now properly model curves manually (as opposed to just using cylinder primitives). I'll be trying it out on the "coarse" version of the Duplo bottom stud. As for BFC statements, I (...) (24 years ago, 10-Jan-01, to lugnet.cad.dev)
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Message is in Reply To:
| | Re: Question about generating curves
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| In lugnet.cad.dat.parts, Franklin W. Cain writes: <snip> (...) <snip> (...) Franklin, Your quite a humorus man. What the hell did you just say! Please allow me to explain why I'm laughing. I didn't graduate high school, I don't have a GED but even (...) (24 years ago, 10-Jan-01, to lugnet.cad.dev)
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